Rotary pump



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ToaZZau/'om it 'may concern:

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EILML'IBRSE, F LGS ANGELES, CAL IFORNM, l.li-.SSIGNOR TO UNION STEAM Plllldl? CQTdPdNY, @E BATTLE CREEK, MICHTGAN, A. GORPQRATION.

ROTARY PUliP.

Be 1t known that l, F RANK F. AMBRosE, a citizen of the United States, residing at the city of Los Angeles, county of VLos Angeles, State of California, have invented p newand useful Improvementsin vRotary Pumps, of which the following isv a specification. o i i ltfy invention relates to that class of rotary pumps in which' piston blades are operated by arotor in which they reciprocate, and the object thereof is to prevent wear on the casing of the pumping chamber and wear on the piston blades. A. further object is to construct a pump of few parts which can be replaced when worn, and wherein the internal parts of the pump may be inspected by the removal of either end of the casing of the pumping chamber. A further object is to provide a pump in which the internal-wearing parts may be oiled.

ln the drawings forming a part of this application llfig. 1 is an end elevation of my improved pump with one of the heads removed and the hub thereof in section, with parts broken away..

Fig. 2 is a longitudinal elevation with parts in section and parts broken.

eferring to the drawings 5 is the body of the outer casing of the umping chamber and has secured thereto egs 6 by means of Which it is secured to its support when installed. This casing is Circular both internally and externally, except at the induction port Z and the eduction port 8, which ports are of usual construction. The ends of body 5 are closed by plates 9 and 10 of identical construction which are removably connected to the body in the usual manner, and only one plate will be described in detail.. Plate 9 has a hub 11 projecting from its inner face. The periphery of this hub is circular and the longitudinal center of thev hub is about three-siXty-fourths of an inch distant from the longitudinal center of body .5. The

,hub is eccentrically bored for the reception of the operating shaft 12 and is provided with a longitudinal oiling channel 13 which is crossed by radial channels 14 which terminate at the surface of the hub. Un the outer surface of plate 9 is a boss 15 that surrounds shaft 12. In boss 15 is a gland 16 having an oiling channel 17 to which oil is supplied in any suitable manner. `Chan- Specification of Letters Patent. .application fiid'aprn 29, 1918. serial ng.

. the yokes, to

llfitented Feb.. 21, 1922. 231,403.

nel 17 openso at its inner end to shaft 12. A. channelinfhead 9 connects with channel 13 in the hub and oil is supplied thereto in any suitable manner. Atubular rotor is rigdly secured to shaft 12 by its hub 19. This rotor carries the piston bladesl which reciprocate in the rotor as it revolves. The outerA portions 20 of the piston blades are identical -in construction and are secured to yokes 21, of identical construction, by screws 22. As shown in the drawings these blades are arranged in pairs Which work at right angles to each other, and the outer portions of each pair of blades are carried by two yokes one of which is secured to the outer ortions of the blades at one end, and the otlier yoke is secured near the other end and just within the end yoke of the other pair. This manner of connecting the yokes to the outer portions of the blades locks the ends of each pair together at one end and nearly at the other end thereby keeping their outer edges absolutely parallel at all times as the wear comes on the inner sides of the yokes which are of the same size and are protected by wearing plates 23. These wearing plates are U-shaped and are tempered to withstand wear.. A spring washer maybe used between plates 23 and take up possible wear. Hnbs 11 are protected by annular sleeves 25 of tempered steel in which are ports 26 which register with channels 14. lt will be observed that there are as many of these sleeves as there are yokes, and that the yokes have a rolling contact therewith, and that the sleeves are revoluble on the hubs. These movements reduce friction and wear and when the parts wear, vnew sleeves may be substituted which will take up such wear, and the pump is thereby restored to its primary eiiiciency. Shaft 12 is operated by any suitable means.

By this construction it will be observed that all the wearing surfaces are formed of hardened removable parts which are kept oiled at all times. By making the ends of the pumping chamber removable repairs can be made to the interior parts by taking off either end, and either end of the'purnp can be placed against a Wall or other immovable structure without preventing access to the interior of the pump. The blades and vokes are so constructed and operated that there is a thin skin of water between the blades 1 -amount of water between the edges of the bladesV and the casing is greater than at other points, such increase being where no loss of efiiciency is ncurred thereby.

Having described my invention, I claim: 1..'A rotary pump comprising a casing having removable ends, said ends having 'internally projecting hubs, said hubs, be!

ing slightly eccentrc; wearing sleeves on `said hubs; a shaft eccentrically disposed through said hubs; a hollow rotor secured to i said shaft; a plurality of blades arranged in pairs operated by said rotor, the blades of each pair being locked together at and-'t near the ends thereof by yokes, removable wearing plates securedto said yokes and contactng with the sleeves on the hubs.

2. A rotary pump comprising a casing having removable ends, said ends having internally projecting hubs, said hubs being slightly eccentric; a shaft disposed eccentrically through said hubs; a hollow rotor secured to' said shaft; a plurality of blades arranged lin pairs operated by said rotor, the blades of each pair being locked together at and near the ends thereof by yokes,said yokes contacting with said ubs to .cause the .reciprocation of the blades in the rotor, i

said hubs having channels therein adapted to apply oil between said yokes and hubs.

In witness that I claim the foregoing IV have hereunto subscribed my name this 22ndjday of `-April 191.

FRANK F. AMBROSE. 

